This is the KOE module, it is japanese for “voice” because it is a complete synth voice in just one affordable module, it is 28 HP width and needs +/- 12V power.

Main features:

One VCO with square and ramp wavefoms with depth and tune controls, tune control is a ten turn potentiometer which allows you easily set octave, tune and fine tune with
just one knob.

Noise sourse, it can be set to affect the VCO frequency or it can be mixed with the VCO and audio input.

One LFO with square and triangle waveforms is can be set to affect the VCO frequency or the Filter cut off, it also features an output jack.

High pass and Low pass vactrol based filter with cutoff and resonance/peak control, it also features an input jack to control the cut off frequency.

Two Envelope generators: EG1 with decay control which is set to affect the cut off frequency of the filter and EG2 with attack and release controls, set to affect the volume, it has an output jack and input jack for the incoming gate signal.

Also it features an audio input, it allows process any axternal audio signal with the filter and envelopes.